Remember the limit is only 2 storeys for a single stairwell. How many storeys can you have with 2? 6 storeys? 12? So you can somehow get a zillion floors of

Remember the limit is only 2 storeys for a single stairwell. How many storeys can you have with 2? 6 storeys? 12? So you can somehow get a zillion floors of people down 2 stairwells, but only one floor of people down one?